Respect {C,LD}FLAGS, fix underlinking

http://bugs.gentoo.org/367853

--- a/bbrun/Makefile
+++ b/bbrun/Makefile
@@ -1,7 +1,7 @@
 CC     = gcc
 LIBDIR = -L/usr/lib -L/usr/X11R6/lib
-LIBS   = -lXpm `pkg-config --libs gtk+-2.0`
-CFLAGS = `pkg-config --cflags gtk+-2.0`
+LIBS   = `${PKG_CONFIG} --libs xext xpm gtk+-2.0`
+DEP_CFLAGS = `${PKG_CONFIG} --cflags xext xpm gtk+-2.0`
 
 OBJS   = bbrun.o \
          ../wmgeneral/wmgeneral.o \
@@ -11,10 +11,10 @@
 all: bbrun
 
 .c.o:
-	$(CC) -g -c -O2 -Wall $< -o $*.o $(CFLAGS)
+	$(CC) $(CFLAGS) $(DEP_CFLAGS) -c -Wall $< -o $*.o
 
 bbrun: $(OBJS)
-	$(CC) -Wall -g -o bbrun $^ $(LIBDIR) $(LIBS)
+	$(CC) $(CFLAGS) $(LDFLAGS) -Wall -o bbrun $^ $(LIBDIR) $(LIBS)
 
 install:
 	cp bbrun /usr/local/bin/